Attoeeet



2 Sheets-Sheet 1 (No Model.)

s. D. FIELD.

' PRINTING TELEGRAPH.

N0. 290,557. Patented Dee. 18,1883.

INVENTOR:

z ATTORNEY.

WITNESSES v (No Model.) I 2 Sheets-Sheet 2. s. D. FIELD. PRINTING TELEGRAPH. No. 290,557. Patented 1360.18, 1883.

WITNESSES: INVENTOR: W4 2, %J/

ATTORNEY,

@JITED STATES aren't @rrrc STEPHEN D. FIELD, OF NE'W YORK, N. Y. ASSIGNOR TO THE COMMERCIAL TELEGBAM COMPANY, OF SAME PLACE.

PRINTING-TELEGRAPH.

SPECIFICATION forming part of Letters Patent No. 290,557, dated December 18, 1883.

Application filed August 27, 1883.

To all whom it may concern.-

Be it known that I, STEPHEN D. FIELD, of New York, in the county of New York and State of Xcw York, have invented a new and useful Improvement in Printing-Telegraphs; and I do hereby declare that the following is a full and exact description of the same, reference being had to the accompanying drawings, and to the letters of reference marked IO thereon.

My invention relates to that class of stepby-stcp or gold and stock printing-tele graphs in which two type-wh eels are used from which arecord is made on one fillet or band of I paper in two parallel lines; and its object is to furnish a novel, simple, and reliable means for determining at will which one of the two typewheels shall be printed from. Each type-wheel is supported on its own shaft, which carries an escape wheel controlled by an anchor.

Both anchors are upon the same shaft, controlled by the armature of one polarized electro-magnet in the main type-wheel circuit. A motor is provided tending normally to rotate 2 5 continuously bothtype-whee1s,which tendency to continuous rotary motion is regulated and changed by. the anchor and escapement noted into a step-by-step or intermittent rotary motion. Thus far the construction is the same as in Letters Patent No. 274,300, granted me March 20, 1883, the difference being in the means employed for determining which wheel shall be printed from, while the other is held in such position that no impression therefrom is had. Each wheel is provided with a blank or unison point, where, if the paper be impressed thereat, no record is made. An organization is provided to always hold one of the wheels at that point, while the other is al- 0 lowed to rotate and be positioned for printing. In the type-wheel circuit is placed an ordinary or neutral electro-magnet, with an ordinary armature, armature-lever, and retractor. The armature-lever at its free end is connected to abar at a right angle. To this bar are loosely or pivotally attached two uprights, the mode of attachment being such that the uprights may have a limited vertical play or movement. These uprights have lugs or projections upon their inner sides in such position that the lever of the printing-magnet shall always,when

(No model.)

called into action, cause devices connected therewith, to be hereinafter described, to strike upon one or the other lug and carry up with it the corresponding upright. The uprights at their upper ends are pivoted to the ends of a rocking bar, hung at its center upon a shaft supported in the framing of the instrument. From this shaft projects downwardly and outwardly, onopposite sides, two arms, the ends 6( of which, when properly positioned, may take against stops placed in the escapement, there being one arm for each escapement. Thus as one or the other upright is carried up by the devicesconnected with the printingmagnet, the shaft is rocked and one or the other arm positioned to come into contact with the stop in the proper escapement and lock it against the stress of the motor, the other escapenient being simultaneously released and 7c allowed to operate. This maybe more clearly understood from the following detailed descrip tion, and from the drawings, in which- Figure 1 is a perspective of the parts embodying the invention, andFig. 2 is a front view of the extra magnet and attachments for determining which wheel shall be rotated and positioned for printing.

The framing, paper-feed, inking devices, motive power, 830., forming no part of this invention, and being well known to those skilled in the art, are omitted from the drawings, in order that the real matters of invention may be more clearly shown, it being well understood that in practice they will be supplied in 8 5 any of the well-known and usual ways.

A A is a polarized electromagnet in the type-wheel circuit 1 1, and having an armature, a, attached to a vibrating or rocking shaft, B, carrying anchors Z2 b.

D E are two type-wheels, each having its own set of characters, its own shaft, and escape-wheel, D being on the shaft 0 with the escape-wheel cl, and E on shaft 0" with escape wheel (2, the anchor b meshing with and con- 5 trolling 61', while b meshes with and controls d. A motive power (not shown) is common to and tends normally to actuate both C and 6 through pinions c c.

In the printing-circuit 22 is the printing or IO press magnet P, having armature p, retractor f and armaturelever PL, carrying the platen or press 1?, of sufficient size to take upon either wheel D or E.

I is an ordinary electro-magnet in the circuit 1 1, provided with armature and armaturelever J and retractor j. At its upper end the lever J is connected to an arm, H, arranged to slide in any well-known and suitable manner. To H are attached the uprights F F, the attachment being one which will permit limited vertical play or movement of F E, which is here accomplished by means of pins passing through slots in F E into the body of H. F F. are provided with lugs or projections f f upon their inner edges. At their upper ends, F F are pivoted to a cross-arm, G, hung at its center upon a shaft, 9, suitably supported in or from the framing of the instrument.

At points upon shaft 9, in contiguity to the escape-wheels d d, are arms 16 t, projecting downwardly in opposite directions, their ends being formed into hooks or stops, as shown. Upon each scape-wheel d d is a stop, 0, the stops 0 and the arms t i being so positioned relatively to each other that whatever be the position of the rocking arm G and shaft 9 one of the stops will take against one of the arms 25 t, while the other stop is free from its arm.

Attached to the printing-lever P L is an arm or shaft, R, to which is attached at right angles a second arm, U, provided with lugs i 12, arranged so that one or the other will always take under the lugs ff on the uprights before mentioned; hence whenever the printingle- Ver is operated the arm U will be likewise operated and control the position, through uprights F F, of the shaft 9 and arms t t.

The retractor j of armature J is so adjusted that normally a strong current is needed to overcome its resilience and permit I to attract J, so if a current less than a normally-strong one be used, 9' will hold J against the attraction of I.

The transmitter (which forms no part of this invention, and hence is not herein illustrated) is so arranged that when stopped to position one wheel it holds the circuit 1 1 closed with normal full strength, while when stopped to position the other wheel it holds the circuit 1 1 either broken or closed, with a current of so much less than normal strength that I does not overcome the force of j. Supposing, now, that the wheel E has been in use, has been positioned, and printed from. During such operation the stop 25 has contacted with 0 on (1, held D against rotation, and in such position that the blank space of the type-wheel D was opposite P, so that no impression could be made therefrom. A change toDis now tobe made. The

transmitter is turned to bring E to blank and stopped, with the circuit 1 1 closed. The force, then, of I holds J to itself. The printing-circuit 2 2 is now closed and the armature-lever P L thrown up, carrying with it the shaft R and arm U, the lug i on the latter striking f on F, lifting it, and thereby turning Gand its attached shaft so as to swing it on its shaft g clear of 0 on d and place 15 in the path of 0 on d. The transmitter being then used, Dis free to rotate, be positioned, and printed from, as long as desired.

WVhen desired to change to E, the circuit 1 1 is either weakened or is left open with the wheels brought to blank and the circuit 2 2 actuated, when 03 strikes f on F, lifting it, depressing F, and causing it to be swung into the path of 0 on (I.

By these means one or the other of the two type-wheels and its escapement is certainly and readily locked at will against the stress of the motive power, and in position to give no impression, while the other is allowed to be freely rotated by the motive power as controlled by the escapement and be positioned and printed from.

I do not claim herein the combination of two type-wheels, each mounted on its own shaft, two escapement mechanismsone for each wheela mechanism adapted to simultaneously lock one type-wheel and unlock the other, and a magnet in the escapementcircuit for positioning the locking and unlocking mechanism to be properly acted on by the printing mechanism; but

What I do claim herein, and desire to secure by Letters Patent, is-

1. The combination,in a printing-telegraph, of two type-wheels, two escapements, one for each wheel, each provided with a lug or stoppin, a polarized magnet controlling both escapem ents, a neutral magnet in the escapementcircuit, and a rocking shaft controlled thereby and carrying two arms adjusted and adapted so that one arm takes upon and contacts with the stop upon one escapement, while the other arm is freed from the stop upon the other escapement, substantially as set forth.

2. The combination, in aprinting-telegraph, of two type-wheels and their respective escapements, each provided with a lug or stop pin, of the shaft 9, carrying arms t t, the crossarm G, attached to g, the uprights F F, and arm U, and shaft R, operated by the printinglever, substantially as set forth.

This specification signed and witnessed this 24th day of August, 1883.

STEPHEN D. FIELD.

Witnesses:

LUTHER E. SHINN, J OHN B. Scorn 

